My FC app takes some time to compile. When it does sometimes it's slow and choppy. When I add pages to the app, and start developing those pages, moving assest around the stage is precarious. Is it best to import pages or projects? Things where fine until I added the tenth page.

Sounds like you're starting to hit some size-related performance problems. We are working on those. I'm not sure what you mean by "is it best to import pages or projects". Could you rephrase the question?

There are 2 things you can do to help speed up FC:

divide your projects into sub-components instead of using a lot of states

convert swaths of graphics into optimized graphics. Just select a chunk of graphics and choose "Convert to Optimized Graphic" in the HUD.